UNO Synth Pro was developed in collaboration with the Italian boutique synthesizer manufacturer Soundmachines and expands upon the popular mini-synthesizer UNO Synth in nearly every area: more oscillators, more filters, more sequencer memory, more effects, more presets, more connections, and more programmability. UNO Synth Pro is available in two housing variants to cater to all players – stage-ready with a robust metal chassis and premium synth-action Fatar keyboard, or ultra-portable, USB-powered with a capacitive keyboard. UNO Synth Pro offers everyone the next generation of analog sound design in a smart format that fits into any space and budget.

Three analog oscillators provide continuously variable waveforms, including pulse-width modulation. The oscillators can be "hard-synced" for harmonically richer sounds, and with the FM oscillator, a wide range of bell-like tones to screaming industrial sounds can be created. UNO Synth Pro even includes ring modulation for wobbly sci-fi sounds and a white noise generator, allowing for a broad range of percussive sounds and epic builds.

In addition to the 2-pole OTA multimode filter of the original UNO Synth, the UNO Synth Pro features a new 2/4-pole low-pass filter with self-oscillation. The two filters can be used in series or parallel, with invertible phase, resulting in a total of 24 possible filter modes. This unique design offers nearly limitless sonic possibilities, from recreating classic vintage sounds to forging entirely new, experimental tones. UNO Synth Pro provides two complete ADSR envelopes, one assigned to the filter and the other to the amplitude. Both are available as sources to modulate everything from oscillator pitch and waveform to LFO speed or even other envelope stages.